YR-5A, 1945, transfers to the USN for evaluation, later to USCG.
Assigned BuNo. 75689 (43-46613), 75690 (43-46618).
Production for 42 cancelled.

XHO3S-3

1

HO3S-1, 1950, prototype with redesigned rotor.

Foreign Conversion

Dragonfly HR.Mk. 5

1+

HR.Mk. 1 / 3, Royal Navy conversions, updated
equipment.

FOREIGN MILITARY / CIVILIAN SERVICE - H-5 helicopters in both military and civil service with Belgium, Brazil, Ceylon,
Canada, Ceylon, Egypt, France, Iraq, Italy, Japan, The Philippines, Thailand,
United Kingdom and Yugoslavia.
- The S-51 was the world's first helicopter to enter commercial service.